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Derivative Instruments and Hedging Activities - Narrative (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Derivative [Line Items]          
Net unrealized gains (losses) arising during the period $ (7,954,000) $ 52,985,000 $ 41,705,000 $ (22,345,000)  
Pre-tax income (loss) (4,800,000) (4,900,000) (14,000,000) (15,800,000)  
Cash flow hedge loss to be reclassified     12,000,000    
Cash flow hedge termination loss     7,000,000    
Reclaim cash collateral 15,500,000   15,500,000   $ 34,600,000
Obligation to return cash collateral 4,600,000   4,600,000   $ 4,600,000
Cash Flow Hedges          
Derivative [Line Items]          
Net unrealized gains (losses) arising during the period $ 0 $ 0 $ 0 $ 0